mirror of
https://github.com/clockworkpi/LauncherGoDev.git
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97 lines
2.2 KiB
Go
97 lines
2.2 KiB
Go
package draw
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import (
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// "fmt"
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// "math"
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"github.com/veandco/go-sdl2/sdl"
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"github.com/veandco/go-sdl2/gfx"
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"../color"
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"../rect"
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)
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func _aa_render_region(image *sdl.Renderer, _rect *sdl.Rect, col color.Color, rad int) {
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corners := rect.Inflate(_rect,-2*rad-1, -2*rad-1)
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topleft := []int{ int(corners.X),int(corners.Y)}
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topright := []int{int(corners.X+corners.W-1), int(corners.Y)}
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bottomleft := []int{int(corners.X), int(corners.Y+corners.H-1)}
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bottomright := []int{int(corners.X+corners.W -1), int(corners.Y+corners.H-1)}
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attributes :=[][]int{topleft, topright, bottomleft, bottomright }
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r,g,b,a := col.RGBA()
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image.SetDrawColor( uint8(r),uint8(g),uint8(b),uint8(a) )
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for i:=0; i< len(attributes);i++ {
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x,y := attributes[i][0],attributes[i][1]
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gfx.AACircleRGBA(image,int32(x),int32(y),int32(rad),uint8(r),uint8(g),uint8(b),uint8(a))
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gfx.FilledCircleRGBA(image,int32(x),int32(y), int32(rad),uint8(r),uint8(g),uint8(b),uint8(a))
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}
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r1 := rect.Inflate(_rect,-2*rad,0)
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r2 := rect.Inflate(_rect,0,-2*rad)
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image.FillRect( &r1 ) // main body except four circles in corners
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image.FillRect( &r2 ) // fix gap between circles of up and down vertical
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}
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//alpha of color should be 255
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func AARoundRect(surf *sdl.Surface,_rect *sdl.Rect,col color.Color,rad,border int, inside color.Color) {
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image,_ := sdl.CreateSoftwareRenderer(surf)
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/*
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image.SetDrawColor(233,100,200,0)
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image.DrawLine(10,20,100,200)
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*/
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// image.Clear()
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_aa_render_region(image,_rect,col,rad)
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if border > 0 {
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rect.InflateIp(_rect,-2*border,-2*border)
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_aa_render_region(image,_rect,inside,rad)
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}
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//image.Present()
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}
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func Point(surf *sdl.Surface, c color.Color, x,y int) {
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pixels := surf.Pixels()
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bytes_per_pixel := surf.BytesPerPixel()
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addr := y * int(surf.Pitch) + x*bytes_per_pixel // 1 2 3 4
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color_bytes := c.ToBytes()
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surf.Lock()
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if bytes_per_pixel == 1 {
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pixels[addr] = color_bytes[0]
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}
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if bytes_per_pixel == 2 {
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for i :=0; i < bytes_per_pixel; i++ {
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pixels[addr+i] = color_bytes[i]
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}
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}
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if bytes_per_pixel == 3 {
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for i :=0; i < bytes_per_pixel; i++ {
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pixels[addr+i] = color_bytes[i]
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}
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}
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if bytes_per_pixel == 4 {
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for i :=0; i < bytes_per_pixel; i++ {
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pixels[addr+i] = color_bytes[i]
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}
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}
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surf.Unlock()
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}
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